On the sickness of our community

Your ontology doesn't scale; it only deals with abusers as isolated individuals, while the problem with online abuse is that it becomes normalized across whole communities. I think this article gives a more useful perspective: http://modelviewculture.com/pieces/abuse-as-ddos

(Or for a more personal view, the author of that piece has also written recently about why they have quit participating in tech publically: http://juliepagano.com/blog/2014/10/10/life-and-times-of-...)

There's no way for a single individual to usefully defend themselves against DDOS abuse; the only defense is a distributed effort across the community to define cultural norms saying that these things are not okay and to enforce those norms against the jerks who try to stir things up anyway. If you see someone being attacked, don't just abandon them to deal with it themselves; help them out.